Parker Laboratories Polysonic® Ultrasound Lotion with Aloe Vera is the only cosmetic quality lotion specifically formulated for ultrasound. Features superior coupling efficiency. One gallon bottle with dispenser. Parker Laboratories Polysonicr Ultrasound Lotion with Aloe Vera is the only cosmetic quality lotion specifically formulated for ultrasound. One gallon bottle with dispenser. Features superior coupling efficiency. Parker Laboratories Polysonicr Ultrasound Lotion with Aloe Vera is the only cosmetic quality lotion specifically formulated for ultrasound